Shield knife replacing diaphragm wall reinforcing structure and reinforcing construction method

A technology for strengthening structures and construction methods, which is applied to foundation structure engineering, sheet pile walls, earthwork drilling and mining, etc. It can solve the problems of high requirements for operators, many processes, and high risks, and achieve low cost, personal safety, and construction period. short effect

Pending Publication Date: 2018-08-21
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 2ND ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the present invention: When the formation conditions in the prior art are not suitable for directly opening the warehouse for normal pressure tool change, the tool change method with pressure has many procedures, high cost, high requirements for operators and high risk, and it is easy to cause ground damage. To solve the problem of quality and safety accidents caused by subsidence, a reinforcement structure and reinforcement construction method for the ground connection wall of the shield tunneling tool change are provided. By setting the reinforcement structure on the shield tunnelin

Method used

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  • Shield knife replacing diaphragm wall reinforcing structure and reinforcing construction method
  • Shield knife replacing diaphragm wall reinforcing structure and reinforcing construction method
  • Shield knife replacing diaphragm wall reinforcing structure and reinforcing construction method

Examples

Experimental program
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Embodiment 1

[0056] Such as figure 1 , figure 2 and image 3 As shown, the ground wall reinforcement structure for shield machine tool change includes the ground wall 1 arranged on the tunnel excavation route. The ground wall 1 is a plain concrete ground wall. The ground connecting wall 1 is arranged at the tool changing position of the excavation route.

[0057] During the excavation process of the shield machine, with the advancement of the excavation depth, the tool wear becomes more and more serious. After the excavation of the shield machine, the tool needs to be changed. The distance of the tool change is within a certain interval length, which can be judged based on experience. The wear amount of the tool, and then determine the tunneling length of the shield machine for tool replacement, so as to determine the position where the tool is changed after the shield machine is driven, so determine the tool change position, and the ground connection wall is set at this position, so th...

Embodiment 2

[0068] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, the reinforcement construction method of the ground connection wall of the shield machine tool change, when arranging the reinforcement structure of the shield machine tool change ground connection wall as in Example 1, proceed according to the following construction steps:

[0069] a. Preset the opening position, predict the wear amount of the shield tool according to the construction stratum and shield tunneling parameters, and determine the position where the shield machine 3 needs to change the tool, so as to preset the opening position on the shield machine 3;

[0070] b. The construction of the ground connection wall 1 is carried out at the position where the tool is changed after the shield machine 3 is excavated, and the construction of the ground connection wall 1 is carried out on the tunnel excavation route;

[0071] c. Shut down after the shield machine 3 is excavated in place, and stop after...

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Abstract

The invention relates to the technical field of tunnel and underground engineering construction, in particular to a shield knife replacing diaphragm wall reinforcing structure and a reinforcing construction method. The shield knife replacing diaphragm wall reinforcing structure includes a diaphragm wall arranged on a shield excavation route. The diaphragm wall is a plain concrete diaphragm wall. The diaphragm wall is disposed at the length portion position of knife replacement after the tunneling of a shield tunneling machine; by arranging the reinforcing structure on the shield excavation route in advance, knife replacement is performed when the shield excavation is performed to the reinforcing structure; due to the arrangement of the reinforcing structure, normal pressure knife replacement can be performed on a knife, so that the shield knife replacing diaphragm wall reinforcing structure has the advantages of being simple, convenient, fast and low in cost and the like during normalpressure knife replacement; at the same time, after the reinforcing structure is arranged, the problems of excavation face collapse and ground subsidence and the like during knife replacement are solved, the surrounding along the line of a tunnel is ensured, and quality safety accidents are effectively avoided.

Description

technical field [0001] The invention relates to the technical field of tunnel and underground engineering construction, in particular to a reinforcement structure and a reinforcement construction method for a ground connecting wall of a shield tunnel tool changer. Background technique [0002] At present, with the continuous development of my country's infrastructure facilities, urban subways have also developed rapidly, and most of the urban subway tunnels use shield machines for tunneling construction. However, when the shield passes through the formation for a long distance or there are sandy pebbles and other high-wear formations, the wear of the shield cutter will be very serious, so the cutter has to be replaced in a planned way. At present, the commonly used methods of shield machine tool change are normal pressure tool change and pressure tool change. [0003] Although the normal pressure tool change method is simple and fast, the applicable geological range is limi...

Claims

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Application Information

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IPC IPC(8): E21D9/08E02D5/18
CPCE21D9/08E02D5/18
Inventor 张绍辉周洋周双禧李雪康洪信郭庆飞张旭周理忠
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 2ND ENG CO LTD
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